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Finding the Fourth Proportional to 318,430.74, 477,630.47 and 118,735.50

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Solution

The fourth proportional to 318,430.74, 477,630.47 and 118,735.50 is: 178,097.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,430.74 : 477,630.47 = 118,735.50 : x
  2. Step 2: Convert to fraction form
    318,430.74/477,630.47 = 118,735.50/x
  3. Step 3: Cross multiply
    318,430.74x = 477,630.47 × 118,735.50
  4. Step 4: Simplify right side
    318,430.74x = 56,711,694,758.64
  5. Step 5: Solve for x
    x = 56,711,694,758.64/318,430.74
  6. Step 6: Final answer
    x = 178,097.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.